*{
    margin: 0;
    padding: 0;
    font-family: '微软雅黑',Arial;
    font-size: 14px;
}
.left{
    float: left;
}
.right{
    float: right;
}
.clear{
    clear: both;
}
a{
    text-decoration: none;

}
ul{
    list-style-type: none;
}
.box{
    width: 100%;
    height: auto;
}
.box_m{
    width: 1200px;
    margin: 0 auto;
}
